<template>
  <div class="rating-select">
    <div class="rating-type border-bottom-1px">
      <span @click="select(2)" class="block positive" :class="{'active': selectType === 2}" >
        {{desc.all}}
        <span class="count">{{ratings.length}}</span>
      </span>
      <span @click="select(0)" class="block positive" :class="{'active': selectType === 0}" >
        {{desc.positive}}
        <span class="count">{{positives.length}}</span>
      </span>
      <span @click="select(1)" class="block negative" :class="{'active': selectType === 1}" >
        {{desc.negative}}
        <span class="count">{{negatives.length}}</span>
      </span>
    </div>
    <div @click="toggle" class="switch" :class="{'on': onlyContent}">
      <span class="icon-check_circle"></span>
      <span class="text">只看有内容的评价</span>
    </div>
  </div>
</template>

<script>
const POSITIVE = 0
const NEGATIVE = 1
const ALL = 2

const EVENT_TOGGLE = 'toggle'
const EVENT_SELECT = 'select'

export default {
  props: {
    // ratings是一个总的开关，是将所有 ratings 传进来，再由ratings计算来决定推荐的数量
    ratings: {
      type: Array,
      default: () => []
    },
    // 默认显示类型，为2
    selectType: {
      type: Number,
      default: ALL
    },
    // 默认的内容显示为false，即显示全部内容
    onlyContent: {
      type: Boolean,
      default: false
    },
    // 默认描述：desc：description
    desc: {
      type: Object,
      default: () => {
        return {
          all: '全部',
          positive: '满意',
          negative: '不满意'
        }
      }
    }
  },
  computed: {
    positives() {
      return this.ratings.filter(rating => {
        return rating.rateType === POSITIVE
      })
    },
    negatives() {
      return this.ratings.filter(rating => {
        return rating.rateType === NEGATIVE
      })
    }
  },
  methods: {
    select(type) {
      this.$emit(EVENT_SELECT, type)
    },
    toggle() {
      this.$emit(EVENT_TOGGLE)
    }
  }
}
</script>

<style lang="stylus" scoped>
@import '~common/stylus/variable'
.rating-select
  .rating-type
    padding 18px 0
    margin 0 18px
  .block
    display inline-block
    padding 8px 12px
    margin-right 8px
    line-height 16px
    border-radius 1px
    font-size $fontsize-small
    color $color-grey
    &.active
      color $color-white
    .count
      margin-left 2px
    &.positive
      background $color-light-blue
      &.active
        background $color-blue
    &.negative
      background $color-light-grey-s
      &.active
        background $color-grey
  .switch
    display flex
    align-items center
    padding 12px 18px
    line-height 24px
    border-bottom 1px solid $color-row-line
    color $color-light-grey
    &.on
      .icon-check_circle
        color $color-green
    .icon-check_circle
      margin-right 4px
      font-size $fontsize-large-xxx
    .text
      font-size $fontsize-small
</style>
